calibration date,IE ions/picogram,RIE SO4,RIE NH4,AB ref ions/sec,flow cm^3/s,comment
2016-10-20,37.82,1.08,3.53,452738,1.73,before shipping
2017-01-01,11.9,1.06,3.54,270766,1.75,calibration period 1
2017-01-17,16.5,1.1,3.49,272713,1.75,calibration period 1
2017-02-08,19.7,1.09,3.4,175916,1.39,calibration period 1
2017-02-25,39.2,0.95,3.47,429445,1.39,"detector change, calibration period 2"
2017-03-10,30.1,1.23,4.24,315335,1.75,calibration period 2
2017-03-18,26.6,1.1,3.62,355077,1.75,calibration period 2
2017-05-02,22.1,1.1,3.58,424944,1.75,after shipping